.popover-mask {
    position: fixed;
    z-index: 99;
    left: 0;
    right: 0;
    top: 0;
    bottom: 0;
    background: #000;
    opacity: .5;
  }
  .popover-content {
    position: fixed;
    z-index: 100;
    left: 0;
    right: 0;
    bottom: 0;
    background: #FFF;
    border-radius: .1rem .1rem 0px 0px;
  }